Boot upper



FIG. 1 is a front perspective view of an embodiment of the claimed design of the boot upper;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is an opposite side elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a front elevation view thereof;

FIG. 7 is a top plan view thereof; and

FIG. 8 is a bottom plan view showing the claimed design of FIG. 1.

FIG. 9 is a front perspective view of a second embodiment of the claimed design of the boot upper in a folded down position;

FIG. 10 is a rear perspective view thereof;

FIG. 11 is a side elevation view thereof;

FIG. 12 is an opposite side elevation view thereof;

FIG. 13 is a rear elevation view thereof;

FIG. 14 is a front elevation view thereof;

FIG. 15 is a top plan view thereof; and,

FIG. 16 is a bottom plan view showing the claimed design of FIG. 9.

The broken lines shown in the drawings represent portions of the outsole that form no part of the claimed design. 

CLAIM The ornamental design for a boot upper, as shown and described. 